Note 833 — I.—PHÆNOGAMOUS OR FLOWERING PLANTS. (continued 7)

Some writers have removed these plants from Cassia to a separate genus named Senna, but such subdivision is repudiated by the principal botanists. The intricate synonymy of the senna plants has been well worked out by J. B. Batka in his memoir entitled Monographie der Cassien-Gruppe Senna (Prag, 1866), of which we have made free use. We have also had the advantage of the recent Revision of the Genus Cassia by Bentham (Linn. Trans., xxvii. 1871. 503) and of the labours of Oliver on the same subject in his Flora of Tropical Africa, ii. (1871) 268-282.